Volcano vaporizer, odd smell

I bought a volcano vaporiser recently and upon sitting down to use it i realised the hot air
coming from it is giving off a weird smell (almost like burnt plastic) i tried returning it to where i had bought it, but the company insisted it was typical, they said they had opened another one and compared them side by side and said both smells are the same. They said to run the volcano and air it out and it should go away.

I've been doing this but the smell still persists. I've never used a volcano before and neither have any of my friends, so i thought to seek here if this is in fact normal.